septi-, sept-, septem-

(Latin: seven, seventh; a word element for number 7)

septenate (s), septenates (pl) (nouns)
Growing in sevens, having seven divisions or a set of seven.
septendecimal (adjective)
Referring to the number seventeen.
septennate (s), septennates (pl) (nouns)
A period of seven years.
septennium (s), sepennia (pl) (nouns)
A cycle or unit of time equal to seven years.
Originally, septem triones, the seven stars of the constellation Ursa Major, the "Great Bear", from septem, "seven" and triones, "a team of three-plow oxen".

These are the principal stars of the "Great Bear" which is located in the region of the north celestial pole and are more commonly perceived as the "Big Dipper".

septet (s), septette; septets, septettes (pl) (nouns)
1. A unit of quantity equal to seven: "Lorna was organizing a septet of dinning places for her guests at the luncheon.
2. A group of seven which is often applied to a musical group of seven performers: "The septet consisted of seven voices accompanied by seven musical instruments."
septifarious (adjective) (not comparable)
A reference to something that is turned in seven different ways or directions.
A woman who is pregnant for the seventh time.